<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addRoles">添加角色</el-button>
                </el-col>
            </el-row>

            <!-- 角色列表区域 -->
            <template>
                <el-table :data="rolesList" style="width: 100%" border>
                    <!-- 展开列 -->
                    <el-table-column type="expand">
                        <template slot-scope="scope">
                            <el-row :class="['bdbottom', index1 === 0 ? 'bdtop' : '', 'vcenter']"
                                v-for="(item1, index1) in scope.row.children" :key="item1.id">
                                <!-- 渲染一级权限 -->
                                <el-col :span="5">
                                    <el-tag closable @close="removeRightById(scope.row, item1.id)">{{
                                        item1.authName
                                    }}</el-tag>
                                </el-col>
                                <!-- 渲染二级和三级权限 -->
                                <el-col :span="19">
                                    <!-- 通过 for 循环 嵌套渲染二级权限 -->
                                    <el-row :class="[index2 === 0 ? '' : 'bdtop', 'vcenter']"
                                        v-for="(item2, index2) in item1.children" :key="item2.id">
                                        <el-col :span="6">
                                            <el-tag type="success" closable
                                                @close="removeRightById(scope.row, item2.id)">{{
                                                    item2.authName
                                                }}</el-tag>
                                            <i class="el-icon-caret-right"></i>
                                        </el-col>
                                        <el-col :span="18">
                                            <el-tag type="warning" closable
                                                @close="removeRightById(scope.row, item3.id)"
                                                v-for="(item3, index3) in item2.children" :key="item3.id">
                                                {{ item3.authName }}
                                            </el-tag>
                                        </el-col>
                                    </el-row>
                                </el-col>
                            </el-row>
                        </template>
                    </el-table-column>
                    <!-- 索引列 -->
                    <el-table-column type="index"></el-table-column>
                    <el-table-column label="角色名称" prop="roleName">
                    </el-table-column>
                    <el-table-column label="角色描述" prop="roleDesc">
                    </el-table-column>
                    <el-table-column label="操作" width="300px">
                        <template slot-scope="scope">
                            <el-button size="mini" type="primary" icon="el-icon-edit" @click="handleEditRole(scope.row)">编辑</el-button>
                            <el-button size="mini" type="danger" icon="el-icon-delete" @click="handleDeleteRole(scope.row)">删除</el-button>
                            <el-button size="mini" type="warning" icon="el-icon-setting"
                                @click="showSetRightDialog(scope.row)">分配权限</el-button>
                        </template>
                    </el-table-column>
                </el-table>
            </template>
        </el-card>

        <!-- 分配权限的对话框 -->
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
            <!-- 树形控件 -->
            <el-tree
                :data="rightsList"
                show-checkbox
                node-key="id"
                default-expand-all
                :default-checked-keys="defKeys" 
                :props="treeProps"
                ref="treeRef">
            </el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allToRights">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 添加角色的对话框 -->
        <el-dialog
            title="提示"
            :visible.sync="addRoleDialogVisible"
            width="50%"
            >
            <el-form ref="addRoleFormRef" :rules="addRoleFormRules" :model="addRoleForm" label-width="100px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="addRoleForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="addRoleForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addRoleDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addRole">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 编辑角色的对话框 -->
        <el-dialog
            title="提示"
            :visible.sync="editRoleDialogVisible"
            width="50%"
            >
            <el-form ref="editRoleFormRef" :rules="editRoleFormRules" :model="editRoleForm" label-width="100px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="editRoleForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="editRoleForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editRoleDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editRole">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>

export default {
    name: 'Roles',
    data() {
        return {
            // 所有角色列表数据
            rolesList: [],
            // 控制分配权限对话框的显示与隐藏
            setRightDialogVisible: false,
            // 所有权限的数据
            rightsList: [],
            // 树形控件的属性绑定对象
            treeProps: {
                children: 'children',
                label: 'authName'
            },
            // 默认选中的节点Id值数组
            defKeys: [],
            // 当前即将分配权限的角色id
            roleId: '',
            // 控制添加角色对话框的显示与隐藏
            addRoleDialogVisible: false,
            // 控制编辑角色对话框的显示与隐藏
            editRoleDialogVisible: false,
            // 添加角色
            addRoleForm: {
                roleName: '',
                roleDesc: ''
            },
            // 编辑角色
            editRoleForm: {
                roleName: '',
                roleDesc: ''
            },
            // 添加表单的验证规则对象
            addRoleFormRules: {
                roleName: [
                    { required: true, message: '请输入角色名称', trigger: 'blur' },
                    { min: 1, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                ],
                roleDesc: [
                    { required: true, message: '请输入角色描述', trigger: 'blur' },
                    { min: 1, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
                ]
            },
            // 添加表单的验证规则对象
            editRoleFormRules: {
                roleName: [
                    { required: true, message: '请输入角色名称', trigger: 'blur' },
                    { min: 1, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                ],
                roleDesc: [
                    { required: true, message: '请输入角色描述', trigger: 'blur' },
                    { min: 1, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
                ]
            },
            roleById: ''
        }
    },
    created() {
        // 获取所有角色的列表
        this.getRoleList()
    },
    methods: {
        // 获取角色列表数据
        async getRoleList() {
            const { data: res } = await this.$http.get('roles')
            // console.log(res);
            if (res.meta.status === 200) {
                this.rolesList = res.data
            } else {
                return this.$message.error('获取角色列表失败！')
            }
        },
        // 根据id删除对应的权限
        async removeRightById(role, rightId) {
            // 弹框提示用户是否要删除
            const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)
            // console.log(confirmResult);
            if (confirmResult === 'confirm') {
                const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
                // console.log(res);
                if (res.meta.status === 200) {
                    // this.getRoleList()
                    role.children = res.data
                } else {
                    return this.$message.error('删除权限失败')
                }
            } else {
                return this.$message.info('取消删除')
            }
        },
        // 展开分配权限的对话框
        async showSetRightDialog(role) {
            this.roleId = role.id;
            this.setRightDialogVisible = true;
            // 获取所有权限的数据
            const { data: res } = await this.$http.get('rights/tree')
            // console.log(res);
            if(res.meta.status === 200) {
                // 把获取到的权限数据保存到 data 中
                this.rightsList = res.data;
                // 递归获取三级节点的id
                this.getLeafKeys(role, this.defKeys)
            }else {
                return this.$message.error('获取权限数据失败')
            }
        },
        // 通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中
        getLeafKeys(node, arr) {
            // 如果当前节点不包含children属性，则是三级节点
            if(!node.children) {
                return arr.push(node.id)
            }

            node.children.forEach(item => this.getLeafKeys(item, arr))
        },
        // 监听分配权限对话框的关闭事件
        setRightDialogClosed() {
            this.defKeys = []
        },
        // 点击为角色分配权限
        async allToRights() {
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys(),
            ]
            console.log(keys);
            const idStr = keys.join(',')
            const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, {
                rids: idStr
            })
            // console.log(res);
            if(res.meta.status === 200) {
                this.$message.success('分配权限成功')
                this.getRoleList()
                this.setRightDialogVisible = false
            }else{
                this.$message.error('分配权限失败')
            }
        },
        // 添加角色
        addRoles() {
            this.addRoleDialogVisible = true;
        },
        // 点击按钮，添加角色
        addRole() {
            this.$refs.addRoleFormRef.validate(async valid => {
                if(valid) {
                    // console.log(valid);
                    const { data: res } = await this.$http.post('roles', {
                        roleName: this.addRoleForm.roleName,
                        roleDesc: this.addRoleForm.roleDesc
                    })
                    console.log(res);
                    if(res.meta.status === 201) {
                        this.getRoleList()
                        this.addRoleDialogVisible = false;
                    }else {
                        return this.$message.error('添加角色失败')
                    }
                }else {
                    return 
                }
            })
        },
        // 编辑角色的对话框
        handleEditRole(roleInfo) {
            console.log(roleInfo);
            this.roleById = roleInfo.id
            this.editRoleDialogVisible = true;
            this.editRoleForm = roleInfo;
        },
        // 编辑角色并提交
        editRole() {
            this.$refs.editRoleFormRef.validate(async valid => {
                if(valid) {
                    // console.log(valid);
                    const { data: res } = await this.$http.put(`roles/${this.roleById}`, {
                        roleName: this.editRoleForm.roleName,
                        roleDesc: this.editRoleForm.roleDesc
                    })
                    // console.log(res);
                    if(res.meta.status === 200) {
                        this.getRoleList()
                        this.$message.success('编辑角色成功')
                        // 隐藏编辑角色的对话框
                        this.editRoleDialogVisible = false
                    }else {
                        return this.$message.error('编辑角色失败')
                    }
                }else {
                    return 
                }
            })
        },
        // 删除角色
        async handleDeleteRole(roleInfo) {
            // 弹窗询问用户是否删除
            const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch (err => err)
            // console.log(confirmResult);
            if(confirmResult === 'confirm') {
                const { data: res } = await this.$http.delete(`roles/${roleInfo.id}`)
                // console.log(res);
                if(res.meta.status === 200) {
                    // 刷新角色列表
                    this.getRoleList()
                }else {
                    return this.$message.error('删除角色失败！')
                }
            }
        }
    },
};

</script>

<style lang="less" scoped>
.bdbottom {
    border-bottom: 1px solid rgb(206, 204, 204);
}

.bdtop {
    border-top: 1px solid rgb(206, 204, 204);
}

.vcenter {
    display: flex;
    align-items: center;
}

.el-tag {
    margin: 7px;
}
</style>
